JS Phaser tilemap position

function createGame( jQuery ) {
    var game = new Phaser.Game(300, 100, Phaser.AUTO, '', { preload: preload, create: create } );

    function preload() {
        game.load.tilemap('map', '/game/assets/sample.json', null, Phaser.Tilemap.TILED_JSON);
        game.load.image('sampletiles', '/game/assets/sampletiles.png');


    }

    function create() {

        var map = game.add.tilemap('map');

        map.addTilesetImage('sampletiles');

        var backLayer = map.createLayer('back');
        var blockLayer = map.createLayer('block');

        $.each( map.layers, function( key, value ) {
            value.y = -2
        });

        var graphics = game.add.graphics(0, 0);
        graphics.lineStyle(2, 0x000000, 1);
        graphics.drawRect(1, 1, 298, 98);
    }
};